一个新的陀螺仪基于一个音声元材料中的缓慢表面声波
Fei Ge1, Liye Zhao2, Jiawen Xu1
1Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, School of Instrument Science and Engineering, Southeast University, 210096, Nanjing, China.
Microsystems & nanoengineering
|November 14, 2024
概括
这项研究引入了一种新的表面声波 (SAW) 陀螺仪,使用音声元材料 (PM) 来增强科里奥利斯效应. 这种创新设计显著提高了角度速度测量灵敏度和性能,特别是在极端环境中.
科学领域:
- 声学元材料是一种声学元材料.
- 惯性传感器 惯性传感器
- 固态物理 固态物理
背景情况:
- 传统的表面声波 (SAW) 陀螺仪由于直接旋转调制而表现出有限的科里奥利斯和陀螺效应.
- 现有的SAW陀螺仪设计在实现高灵敏度和性能方面面临挑战,特别是在苛刻的条件下.
研究的目的:
- 开发一种新的SAW陀螺仪,利用音声元材料 (PM) 进行增强的科里奥利斯效应检测.
- 为了研究PM中以低声画廊模式 (WGMs) 操作的陀螺效应.
- 提出和验证一个间接调制方案,以改进角度速度测量.
主要方法:
- 使用理论建模和有限元法 (FEM) 模拟来分析旋转下的PM行为.
- 对旋转诱导的WGM分裂和在PM中SAW相速调节的研究.
- 基于PM中缓慢SAW传播的SAW陀螺仪设计的开发,用于角速度检测.
主要成果:
- 旋转被证明可以线性诱导WGM分裂,并将SAW相位速度降低到4600 m/s.
- 旋转方向在PM振动和不对称的传递SAW分布中显示了奇拉对称性.
- 拟议的陀螺仪实现了0.016度/Hz的灵敏度与50个细胞的PM,展现了430-1600倍增强陀螺增益因子.
结论:
- 该研究介绍了一种创新的间接调制方案,用于SAW陀螺仪使用旋转依赖PM.
- 拟议的陀螺仪表现出与现有的基于相位速度调制的设计相比,显著提高了性能.
- 这种方法为高性能角速度测量提供了有希望的途径,特别是在极端环境中.
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